better to add a couple new good toll lanes to I-5 and raise or remove the speed limit. A 100 mph cruise will get you point to point just as fast when you factor in train stops, park and ride, etc. You can do Grapevine to bay bridge now in four hours if you hustle a bit

No it is time to stop building more highways. More cars and more roads are not the cost effective answer. The US needs other modes of transportation especially high speed rail. It will not be a "train to nowhere" if they complete it to its planned destinations.